1 files changed, 63 insertions, 0 deletions
diff --git a/clang/lib/Interpreter/IncrementalExecutor.cpp b/clang/lib/Interpreter/IncrementalExecutor.cpp
new file mode 100644
index 000000000000..9a368d9122bc
--- /dev/null
+++ b/clang/lib/Interpreter/IncrementalExecutor.cpp
@@ -0,0 +1,63 @@
+//===--- IncrementalExecutor.cpp - Incremental Execution --------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the class which performs incremental code execution.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IncrementalExecutor.h"
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
+#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
+#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
+#include "llvm/ExecutionEngine/Orc/LLJIT.h"
+#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
+#include "llvm/ExecutionEngine/SectionMemoryManager.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/TargetSelect.h"
+
+namespace clang {
+
+IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC,
+                                         llvm::Error &Err,
+                                         const llvm::Triple &Triple)
+    : TSCtx(TSC) {
+  using namespace llvm::orc;
+  llvm::ErrorAsOutParameter EAO(&Err);
+
+  auto JTMB = JITTargetMachineBuilder(Triple);
+  if (auto JitOrErr = LLJITBuilder().setJITTargetMachineBuilder(JTMB).create())
+    Jit = std::move(*JitOrErr);
+  else {
+    Err = JitOrErr.takeError();
+    return;
+  }
+
+  const char Pref = Jit->getDataLayout().getGlobalPrefix();
+  // Discover symbols from the process as a fallback.
+  if (auto PSGOrErr = DynamicLibrarySearchGenerator::GetForCurrentProcess(Pref))
+    Jit->getMainJITDylib().addGenerator(std::move(*PSGOrErr));
+  else {
+    Err = PSGOrErr.takeError();
+    return;
+  }
+}
+
+IncrementalExecutor::~IncrementalExecutor() {}
+
+llvm::Error IncrementalExecutor::addModule(std::unique_ptr<llvm::Module> M) {
+  return Jit->addIRModule(llvm::orc::ThreadSafeModule(std::move(M), TSCtx));
+}
+
+llvm::Error IncrementalExecutor::runCtors() const {
+  return Jit->initialize(Jit->getMainJITDylib());
+}
+
+} // end namespace clang